When you finish with washing your floors with acid, wait for 24 hours before you start grout sealing. If you do not wait long enough, there won’t be enough resources for sealer to grip to the surface. You better check out all the grout on the floor because you won’t be able to change any details once the sealing is over. I want to remind you again, you should not be sealing at all if you haven’t used grout cleaner at first place.

I recommend you find and buy the best grout sealer in your local retail store, because that one will last for a long time and be able to endure what other sealers can’t. You don’t want to spend all the tile grout sealer and leave the work unfinished, buy more than you need and you can return the rest. Start applying the sealer once you prepared the floor, your tools and everything else you need for this activity.